Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Last Update: 400 AM AST Wed Jan 28 2026

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San Juan, PR Local Forecast Office

25NM WNW San Juan PR

Marine Zone Forecast

Today

East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots this afternoon. Seas 3 to 4 feet. Wave detail: northeast 3 feet at 9 seconds and northeast 2 feet at 4 seconds. Isolated showers this morning. Scattered showers early this afternoon, then isolated showers late.

Tonight

East winds 5 to 10 knots. Seas 3 to 4 feet. Wave detail: northeast 3 feet at 9 seconds and northwest 1 foot at 11 seconds.

Thursday

East winds 5 to 10 knots. Seas 3 to 5 feet. Wave detail: north 4 feet at 11 seconds and east 3 feet at 9 seconds.

Thursday Night

East winds 5 to 10 knots. Seas 4 to 5 feet. Wave detail: north 4 feet at 11 seconds and east 3 feet at 9 seconds.

Friday

East winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots in the afternoon. Seas 4 to 5 feet. Wave detail: north 4 feet at 10 seconds and east 3 feet at 9 seconds. Scattered showers.

Friday Night

East winds 10 to 15 knots, becoming southeast 5 to 10 knots after midnight. Seas 4 to 5 feet. Wave detail: east 3 feet at 4 seconds and north 3 feet at 9 seconds. Scattered showers.

Saturday

Southeast winds 5 to 10 knots, becoming east 10 to 15 knots in the afternoon. Seas 4 to 5 feet.

Saturday Night

South winds 5 to 10 knots. Seas 4 to 5 feet.

Sunday

South winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 4 feet. Scattered showers in the afternoon.

Sunday Night

West winds 5 to 10 knots, becoming northwest after midnight. Seas 3 to 4 feet. Scattered showers.